CN104291529B - The apparatus and method of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent - Google Patents

The apparatus and method of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent Download PDF

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CN104291529B
CN104291529B CN201410536416.5A CN201410536416A CN104291529B CN 104291529 B CN104291529 B CN 104291529B CN 201410536416 A CN201410536416 A CN 201410536416A CN 104291529 B CN104291529 B CN 104291529B
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denitrification
reactor
municipal effluent
water
nitrate
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CN104291529A (en
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彭永臻
杜睿
操沈彬
王淑莹
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Beijing University of Technology
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/286Anaerobic digestion processes including two or more steps
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/02Temperature
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/06Controlling or monitoring parameters in water treatment pH

Abstract

The invention provides the apparatus and method of a kind of part denitrification-Anammox synchronous processing high concentration nitrate waste water and municipal effluent, belong to field of biological sewage treatment.Nitrate wastewater and municipal effluent entering part denitrification reactor, heterotrophic denitrifying Bacteria utilizes the biodegradable organic carbon source in municipal effluent to be nitrite by nitrate reduction, water outlet enters anaerobic ammonia oxidation reactor, ammonia nitrogen in municipal effluent and nitrite generate nitrogen by Anammox reaction, realize high concentration nitrate waste water and municipal effluent simultaneous denitrification, without the need to additional carbon, operational management is convenient, reduce running cost, save energy consumption, nitric efficiency is high.

Description

The apparatus and method of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent
Technical field
The present invention relates to the apparatus and method of a kind of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent, belong to the technical field of biological sewage treatment, specifically by nitrate wastewater and municipal effluent entering part denitrification reactor simultaneously in proportion, the denitrification flora that wherein a class has an incomplete Denitrification Characteristics utilizes biodegradable organic carbon source in municipal effluent to be nitrite by nitrate reduction, the nitrite of the ammonia nitrogen in municipal effluent and denitrification accumulation is obtained by reacting removal by Anammox again, realize high concentration nitrate waste water and municipal effluent denitrogenation simultaneously.
Background technology
Along with the high speed development of economic construction; be on the rise by nitrogen, the excessive body eutrophication problem caused of phosphorus; for the removal of the nutritive elements such as nitrogen phosphorus in enhanced sewage, the ecological functions of protection receiving water body; the nitrogen phosphorus emission standard of wastewater treatment in China also improves constantly, to the overall control also pay attention to day by day of the pollution substance such as nitrogen, phosphorus.Control the nutritive element such as nitrogen, phosphorus in point-source pollution to discharge to natural water body, be one of important means of Disposal of Water Body Eutrophication, and town sewage and trade effluent nitrogen and phosphorus pollutants remove the Focal point and difficult point remaining current water prevention and cure of pollution and regeneration effluent Water circulation.High concentration nitrate waste water is the waste water that a kind of nitrogen load is higher, in sewage work, the water outlet of sludge-digestion liquid aerobic nitrification and other trade effluents all can produce high concentration nitrate, not only increase the load of sewage work's denitrogenation, also add operation processing costs, organic carbon source deficiency then can affect denitrification effect, affect effluent quality, carrying out high concentration nitrate denitrogenation of waste water is cost-effectively important process in sewage disposal.
Traditional biological denitrogenation is by denitrification process, and it is that denitrifying bacteria utilizes biodegradable organic that nitrate is reduced to nitrogen completely, thus reaches the object of sewage water denitrification.For high concentration nitrate waste water, its complete denitrification is needed consume large amount of organic, both wasted organic carbon source, and turn increased the operation expense needed for process, and do not meet the principle of current low energy consumption high-efficiency denitrogenation.Part denitrification refers to by controlling carbon-nitrogen ratio suitable in denitrification process and hypoxia response time, is nitrite, and does not carry out the process that nitrate reductase is nitrogen, thus realize the accumulation of denitrification process nitrite by nitrate reduction.Nitrite is one of response matrix of Anammox autotrophic denitrification process, therefore can be removed by Anammox effect.Anaerobic ammonium oxidation process does not need the advantages such as additional carbon, excess sludge production are low to be subject to extensive concern because of it, therefore, part denitrification and Anammox is integrated as high concentration nitrate wastewater treatment and provides new approach.
Municipal effluent mainly comprises ammonia nitrogen and a large amount of biodegradable organic, and the organic carbon source that this part organism can be used as in denitrification process is utilized by denitrifying bacteria, by nitrate reduction.Utilize traditional nitration denitrification method to carry out municipal effluent denitrogenation and waste a large amount of organic carbon source in former water, denitrification effect is unsatisfactory, still needs additional carbon to improve denitrification effect, because this increasing working cost.And the accumulation of municipal effluent short distance nitration process nitrous is difficult to realize and maintain stable, it is the bottleneck that municipal effluent Anammox realizes.
Utilizing part denitrification to combine with Anammox, process high concentration nitrate waste water and municipal effluent simultaneously, is solve the one economy of sewage water denitrification, effective new way.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, the apparatus and method of a kind of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent are proposed, specifically by nitrate wastewater and municipal effluent entering part denitrification reactor simultaneously in proportion, the denitrification flora that wherein a class has an incomplete Denitrification Characteristics utilizes biodegradable organic carbon source in municipal effluent to be nitrite by nitrate reduction, the nitrite of the ammonia nitrogen in municipal effluent and denitrification accumulation is obtained by reacting removal by Anammox again, realize high concentration nitrate waste water and municipal effluent denitrogenation simultaneously.
The object of the invention is to be achieved through the following technical solutions:
The device of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent is characterized in that, comprises nitrate wastewater water tank 1, municipal effluent water tank 2, part denitrification reactor 3, intermediate water tank 4, part denitrification process Controlling System 5, anaerobic ammonia oxidation reactor 6;
Nitrate wastewater water tank 1 is connected with part denitrification reactor 3 water inlet pipe by the first peristaltic pump 1.1; Municipal effluent water tank 2 is connected with part denitrification reactor water inlet pipe by the second peristaltic pump 2.1; Part denitrification reactor is provided with the first whipping appts 3.1, first water outlet 3.2, first water outlet and is connected with water discharge valve 3.3 by rising pipe; Part denitrification reactor is connected with intermediate water tank 4; Part denitrification process Controlling System 5 is connected with part denitrification reactor; Intermediate water tank is connected with anaerobic ammonia oxidation reactor 6 water inlet pipe by the 3rd peristaltic pump 6.1; Anaerobic ammonia oxidation reactor is provided with the second whipping appts 6.2, temperature-control device 6.3 and the second water outlet 6.4;
Described part denitrification process Controlling System comprises pH sensor 5.1, pH determinator 5.2, computer 5.3, process controller 5.4; PH sensor is provided with in described part denitrification reactor, pH sensor is connected with pH determinator, pH determinator is connected with Computer signal input port by signal data line, computer is connected with process controller, and the signal output port of process controller is connected with the switch of water discharge valve with the switch of the first whipping appts.
The method of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent, is characterized in that, comprise the following steps:
Inoculation has the denitrification mud of incomplete Denitrification Characteristics in part denitrification reactor, and controlling sludge concentration in inoculation post-reactor is 2000 ~ 4000mg/L; The denitrification mud nitrite accumulation rate inoculated reaches 80% ~ 100%;
Inoculation anaerobic ammonium oxidation sludge is in anaerobic ammonia oxidation reactor, and controlling sludge concentration in inoculation post-reactor is 1500 ~ 3000mg/L; The anaerobic ammonium oxidation sludge nitrogen removal rate inoculated reaches 70% ~ 90%;
Nitrate wastewater in municipal effluent in municipal effluent water tank and nitrate wastewater water tank enters into part denitrification reactor for 5:1 ~ 10:1 by volume, and in nitrate wastewater, nitrate nitrogen concentration is 400 ~ 800mg/L; Anoxia stirring 1 ~ 3h after the water inlet of part denitrification reactor, pH value change in on-line monitoring part denitrification reactor, pH value signal is imported into by pH determinator and is calculated by computer, when flex point appears in pH upcurve, signal imports process controller into, and control the closedown of whipping appts switch, stir and stop; 0.5 ~ 1h is staticly settled after stirring terminates; Drainage valve switch is opened, and supernatant liquor is expelled to intermediate water tank, controls draining than 50% ~ 70%;
Waste water in intermediate water tank pumps into anaerobic ammonia oxidation reactor; Anoxia stirring 5 ~ 8h after water inlet, it is 28 ~ 32 DEG C that temperature controls; Staticly settle 0.5 ~ 1h after stirring terminates, after precipitation terminates, supernatant liquor is discharged, control draining than 50% ~ 70%.
Know-why:
Part denitrification-Anammox process high concentration nitrate waste water and municipal effluent are by high concentration nitrate waste water and municipal effluent first by a certain percentage entering part denitrification reactor, there is containing a class in this reactor the denitrifying bacteria of incomplete Denitrification Characteristics, nitrate reduction can only be nitrite by it, and does not carry out the process that nitrate reductase is nitrogen.Nitrate wastewater in nitrate wastewater water tank enters into part denitrification reactor for 5:1 ~ 10:1 by volume, after water inlet, nitrate wastewater is diluted by municipal effluent, the interior initial COD of guarantee reactor and the ratio of nitrate nitrogen mass concentration are 2.0 ~ 3.5 simultaneously, denitrifying bacteria utilizes in municipal effluent containing the organism that can be utilized by microorganism, be nitrite by nitrate reduction, pH value change in part denitrification on-line monitoring reactor, stop when flex point appears in pH upcurve stirring, water outlet nitrite accumulation rate can reach 80% ~ 100% and remain stable, the ratio of the ammonia nitrogen in water outlet and nitrite nitrogen concentration is made to be 1:1 ~ 1:1.3.Water outlet enters into anaerobic ammonia oxidation reactor, and ammonia nitrogen and nitrite nitrogen generate nitrogen by Anammox effect, realize the simultaneous denitrification of high concentration nitrate waste water and municipal effluent.
The part denitrification that the present invention relates to-Anammox process high concentration nitrate waste water and municipal effluent have the following advantages:
1) compare complete denitrification, high concentration nitrate waste water carries out part denitrification can save organic carbon source, reduces working cost;
2) biodegradable organic in municipal effluent is made full use of, for part denitrification provides electron donor, without the need to additional carbon;
3) nitrate in high concentration nitrate waste water utilizes the flora of incomplete Denitrification Characteristics to realize higher nitrite accumulation rate, and the ammonia nitrogen synchronously and in municipal effluent is removed by autotrophic denitrification, reduces running cost, reduces excess sludge production.
Accompanying drawing explanation
Fig. 1 is the schema of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent method.
Embodiment
Below in conjunction with accompanying drawing and specific examples, the invention will be further described:
The device of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent is characterized in that, comprises high concentration nitrate waste water water tank 1, municipal effluent water tank 2, part denitrification reactor 3, intermediate water tank 4, part denitrification process Controlling System 5, anaerobic ammonia oxidation reactor 6.
Nitrate wastewater water tank 1 is connected with part denitrification reactor 3 water inlet pipe by the first peristaltic pump 1.1; Municipal effluent water tank 2 is connected with part denitrification reactor water inlet pipe by the second peristaltic pump 2.1; Part denitrification reactor is provided with the first whipping appts 3.1, first water outlet 3.2, and water outlet is connected with water discharge valve 3.3 by rising pipe; Part denitrification reactor is connected with intermediate water tank 4; Part denitrification process Controlling System 5 is connected with part denitrification reactor; Intermediate water tank is connected with anaerobic ammonia oxidation reactor 6 by the 3rd peristaltic pump 6.1; Anaerobic ammonia oxidation reactor is provided with the second whipping appts 6.2, temperature-control device 6.3 and the second water outlet 6.4.
Described part denitrification process Controlling System comprises pH sensor 5.1, pH determinator 5.2, computer 5.3, process controller 5.4; PH sensor is provided with in described part denitrification reactor, pH sensor is connected with pH determinator, pH determinator is connected with Computer signal input port by signal data line, computer is connected with process controller, and the signal output port of process controller is connected with the switch of water discharge valve with the switch of whipping appts.
Specifically comprise following process:
Inoculation has the denitrification mud of incomplete Denitrification Characteristics in part denitrification sbr reactor device, and in inoculation post-reactor, sludge concentration MLSS is 3500mg/L; This denitrification mud carrys out the denitrification sbr reactor device of self-operating more than 6 months, and water outlet nitrite accumulation rate reaches 85%; Inoculate in anaerobic ammonium oxidation sludge and Anammox sbr reactor device, in inoculation post-reactor, sludge concentration MLSS is 2000mg/L; This anaerobic ammonium oxidation sludge carrys out the Anammox sbr reactor device of self-operating more than 6 months, and nitrogen removal rate reaches 75%.
Test municipal effluent used and adopt Families Home of Beijing University of Technology sanitary sewage, significant parameter is: COD is 200 ~ 300mg/L, and ammonia nitrogen concentration is 60 ~ 85mg/L, total nitrogen concentration 60 ~ 90mg/L; This Domestic sewage collecting is in municipal effluent water tank; Test high concentration nitrate waste water used adopt certain sludge from wastewater treatment plant Digestive system aerobic nitrification after water outlet, its nitrate concentration is 450 ~ 600mg/L, collects in nitrate wastewater water tank.
Part denitrification sbr reactor device useful volume is 12L, and the total sewage quantity of each cycle process is 7.2L; Nitrate wastewater in the municipal effluent of municipal effluent water tank and nitrate wastewater water tank pumps into part denitrification reactor for 6.2:1 by volume simultaneously; Each cycle nitrate wastewater water inlet volume is 1L, and city domestic sewage water inlet volume is 6.2L; After part denitrification reactor water inlet end, the anoxia stirring end time is a certain moment between 1 ~ 3h, and by pH value change in pH Sensor monitoring reactor, pH value signal imports computer into by pH determinator, carry out derived function, when pH upcurve occurs flex point computer-chronograph by data line by signal input process controller, process controller controls whipping appts switch and cuts out, and stirs and stops; 30min is staticly settled after stirring terminates; Process controller controls drainage valve switch and opens, and supernatant liquor is expelled to intermediate water tank, and volume of displacement is 7.2L, and draining is than 60%, and the concentration ratio of water outlet ammonia nitrogen and nitrite is between 1:1 ~ 1:1.3.
Waste water in intermediate water tank pumps into Anammox sbr reactor device; This sbr reactor device useful volume 12L, each cycle water inlet volume 7.2L, anoxia stirring 6h after water inlet, it is 30 DEG C that temperature controls; Staticly settle 1h after stirring terminates, discharged by 7.2L supernatant liquor after precipitation terminates, draining ratio is 60%.Water outlet ammonia nitrogen concentration <5mg/L, nitrate concentration <5mg/L, total nitrogen <10mg/L, nitrogen removal rate reaches 90% ~ 95%.
Long run test result shows:
Part denitrification sbr reactor device sludge concentration MLSS is 3500mg/L, nitrate wastewater in the municipal effluent of municipal effluent water tank and high concentration nitrate waste water water tank is that 6.2:1 is as water inlet by volume, anoxia stirring 1 ~ 3h, pH value change in part denitrification on-line monitoring reactor, stop when flex point appears in pH upcurve stirring, draining is than 60%; Anammox sbr reactor device MLSS is 2000mg/L, anoxia stirring 6h, and draining ratio is 60%; The total sewage quantity of whole system each cycle process is 7.2L, without the need to additional carbon, water outlet ammonia nitrogen concentration <5mg/L, nitrate concentration <5mg/L, total nitrogen <10mg/L, nitrogen removal rate reaches 90% ~ 95%, can realize municipal effluent and the denitrogenation of high concentration nitrate waste water synchronous high-efficiency.

Claims (2)

1. the device of part denitrification-Anammox process high concentration nitrate waste water and municipal effluent, it is characterized in that, comprise nitrate wastewater water tank (1), municipal effluent water tank (2), part denitrification reactor (3), intermediate water tank (4), part denitrification process Controlling System (5), anaerobic ammonia oxidation reactor (6);
Nitrate wastewater water tank (1) is connected with part denitrification reactor (3) water inlet pipe by the first peristaltic pump (1.1); Municipal effluent water tank (2) is connected with part denitrification reactor water inlet pipe by the second peristaltic pump (2.1); Part denitrification reactor is provided with the first whipping appts (3.1), the first water outlet (3.2), and the first water outlet is connected with water discharge valve (3.3) by rising pipe; Part denitrification reactor is connected with intermediate water tank (4); Part denitrification process Controlling System (5) is connected with part denitrification reactor; Intermediate water tank is connected with anaerobic ammonia oxidation reactor (6) water inlet pipe by the 3rd peristaltic pump (6.1); Anaerobic ammonia oxidation reactor is provided with the second whipping appts (6.2), temperature-control device (6.3) and the second water outlet (6.4);
Described part denitrification process Controlling System comprises pH sensor (5.1), pH determinator (5.2), computer (5.3), process controller (5.4); PH sensor is provided with in described part denitrification reactor, pH sensor is connected with pH determinator, pH determinator is connected with Computer signal input port by signal data line, computer is connected with process controller, and the signal output port of process controller is connected with the switch of water discharge valve with the switch of the first whipping appts.
2. application rights requires that described in 1, device carries out the method for part denitrification-Anammox process high concentration nitrate waste water and municipal effluent, is characterized in that, comprises the following steps:
Inoculation has the denitrification mud of incomplete Denitrification Characteristics in part denitrification reactor, and controlling sludge concentration in inoculation post-reactor is 2000 ~ 4000mg/L; The denitrification mud nitrite accumulation rate inoculated reaches 80% ~ 100%;
Inoculation anaerobic ammonium oxidation sludge is in anaerobic ammonia oxidation reactor, and controlling sludge concentration in inoculation post-reactor is 1500 ~ 3000mg/L; The anaerobic ammonium oxidation sludge nitrogen removal rate inoculated reaches 70% ~ 90%;
Nitrate wastewater in municipal effluent in municipal effluent water tank and nitrate wastewater water tank enters into part denitrification reactor for 5:1 ~ 10:1 by volume, and in nitrate wastewater, nitrate nitrogen concentration is 400 ~ 800mg/L; Anoxia stirring 1 ~ 3h after the water inlet of part denitrification reactor, pH value change in on-line monitoring part denitrification reactor, pH value signal is imported into by pH determinator and is calculated by computer, when flex point appears in pH upcurve, signal imports process controller into, and control the closedown of whipping appts switch, stir and stop; 0.5 ~ 1h is staticly settled after stirring terminates; Drainage valve switch is opened, and supernatant liquor is expelled to intermediate water tank, controls draining than 50% ~ 70%;
Waste water in intermediate water tank pumps into anaerobic ammonia oxidation reactor; Anoxia stirring 5 ~ 8h after water inlet, it is 28 ~ 32 DEG C that temperature controls; Staticly settle 0.5 ~ 1h after stirring terminates, after precipitation terminates, supernatant liquor is discharged, control draining than 50% ~ 70%.
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